You can use the TlkEditor and open up the dialog.tlk file in the main directory. From there you need to look up the journal reference, let's just say for instance it is 174593 (just a random set of numbers, no idea what the actual reference really is). Then you need to search for 174593 and once you find it, then you can edit it. I never really liked the dialog.tlk file so I always set up the global.jrl to work independently of that file. Anyways, I hopes this help, let me know if you are still having problems.

Not sure what's FS2 is about since it's perfectly possible.
It however, will screw up KSE.

It's what TSLRCM used before altering the dialog.tlk instead since even if possible, it's the better option. Of course with M4-78EP the global.jrl is modified again, re-introducing the KSE-issue again, but it's just a bit too much text to go adding to the dialog.tlk :/